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Home >> Acura >> 2003 >> 3.2CL Base >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control Communication Circuit Troubleshooting (A/T)
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Cruise Control Communication Circuit Troubleshooting (A/T)

  1. Start the engine.
  2. Turn on the cruise control main switch, then drive the vehicle to speeds over 25 mph (40 km/h) with the cruise control.

    Does the cruise control operate? 

    1. YES  -Go to step 3.
    2. NO  -Check the cruise control unit or cruise control actuator.
  3. Turn the ignition switch OFF.
  4. Disconnect cruise control unit 14P connector and PCM connector A (32P).
  5. Check for continuity between the No. 8 terminal of the cruise control unit 14P connector and body ground.
    Fig 1: Checking For Continuity Between The No.8 Terminal Of The Cruise Control Unit 14P Connector And Body Ground
    G01897463Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  -Repair short to ground in the wire between PCM connector terminal A5 and the cruise control unit 14P connector terminal No. 8.
    2. NO  -Go to step 6.
  6. Reconnect the cruise control unit 14P connector and PCM connector A (32P).
  7. Connect a voltmeter between the No. 8 terminal of the cruise control unit 14P connector and body ground. Test-drive the vehicle at speeds over 25 mph (40 km/h) with the cruise control set, and watch the voltmeter.
    Fig 2: Connecting A Voltmeter Between The No. 8 Terminal Of The Cruise Control Unit 14P Connector And Body Ground
    G01897464Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 1 V? 

    1. YES  -Go to step 8.
    2. NO  -Substitute a known-good cruise control unit. If the system works properly, replace the cruise control unit.
  8. Connect a voltmeter between PCM connector terminal A5 and body ground. Drive the vehicle at speeds over 25 mph (40 km/h) with the cruise control set, and watch the voltmeter.
    Fig 3: Connecting A Voltmeter Between PCM Connector Terminal A5 And Body Ground
    G01897465Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 1 V? 

    1. YES  -Check for loose connectors of the BLU/GRN wire between the cruise control unit and PCM. If necessary replace the PCM and recheck (see POWERTRAIN CONTROL MODULE ).
    2. NO  -Repair open in the wire between the PCM connector terminal A5 and the cruise control unit 14P connector terminal No. 8.
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